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分别采用聚合物先驱体浸渗热解法(PIP)、浆料浸渗法(SI)结合PIP法和化学气相渗透法(CVI)制备了C/SiC复合材料,利用化学气相沉积(CVD)工艺在三种C/SiC复合材料表面制备了ZrC涂层,得到了C/SiC-ZrC复合材料。考核了三种C/SiC-ZrC复合材料在甲烷燃气环境中的氧化行为。结果表明:在甲烷风洞中1800℃氧化30 min后,前两种工艺制备的C/SiC-ZrC复合材料表面氧化严重,氧化失重率均达到12%以上;CVI工艺制备的C/SiC-ZrC复合材料氧化失重率最小(6.9%),抗氧化性能最好。
C / SiC composites were prepared by polymer precursor infiltration pyrolysis (PIP), slurry infiltration (SI) combined with PIP and chemical vapor infiltration (CVI) respectively. The chemical vapor deposition ZrC coating was prepared on the surface of three kinds of C / SiC composites to obtain C / SiC-ZrC composite. The oxidation behavior of three C / SiC-ZrC composites in methane gas environment was evaluated. The results show that the surface oxidation of C / SiC-ZrC composites prepared by the former two processes is serious with the oxidation loss weight loss reaching more than 12% after being oxidized at 1800 ℃ for 30 min in a methane tunnel. The CVI / Oxidation weight loss of composite materials the smallest (6.9%), the best oxidation resistance.